Electric circuit



Nb Model.)

W. W. JACQUES. Electric Circuit.

No. 241,371. Patented May 10, I881.

\Xfiiqase. IF X/EE IUY.

fil/JLL N4 PETERS, Photoikhographer, Washingfion, D C.

- detached portions of its length not starting of a circuit whollymetallic in the region extended from one terminal station through allWILLIAM W. JACQUES, OF

ELECTRIC PATENT OFFICE.

BoSToiI, MASSACHUSETTS.

CIRCUIT,

SPECIFICATION forming part of Letters Patent No. 241,371, dated May 10,1881.

Application filed March 25, 1881.

To all whom it may concern Beit known that I, WILLIAM W. J AGQUES, ofBoston, county of Suffolk, and State of Massachusetts, have invented anew and useful Improvementin Electric Circuits, of which the followingdescription, in connection with the accompanying drawing, is aspecification.

My invention relates to an electric circuit or arrangement of conductorsand other apparatus, as hereinafter described, forming a continuous lineof communication for the trans mission of electric impulses, and has forits object to prevent inductive disturbances from neighboring parallellines, and is especially intended to be used where the line is exposedto disturbing influence only for one or more from either terminalthereof. K

The inductive disturbances have been neutralized efl'ectively by a planinvolving the use posed to inductive disturbance, and in order to make acomplete operative circuit the said metallic or double-wire circuit hasto be exthe exposed regions, at the end of which one wire may begrounded and the other extended onto the other terminal station andthere grounded, or, by another plan, suitable apparatus is employed totransmit the electrical impulses froma single wire or grounded circuitto a double wire or metallic circuit traversing the disturbed region,and from this again to a grounded circuit, as shown and described in thePatent No. 232,788, dated September 28, 1880, to which reference may behad, in which induction-coils were employed to transmit the impulsesfrom one circuit to another.

In the presentinvention two separate insulated wires are employed in thedisturbed region, and single wires are employed outside of the saidregion, and suitable transmitting apparatus, as hereinafter described,is interposed between the single and double wire portionsof the entireline by which an electric impulse in the single wire will impartsubstantiallyequal and oppositeimpulses to the two wires in thedisturbed region,and these equal and opposite impulses in the two wireswill again impart a (No model.)

end of the disturbed region. The equal and opposite impulses willproduce no effect by induction upon a neighboring wire equally exposedto both, and consequently the transmission of messages over the linewill produce no disturbance, and the transmitting apparatus is of suchnature that equal and similar impulses in the two wires (such asproduced by induction from a neighboring wire) will not impart anyimpulse to the single wires outside of the disturbed region. i

The transmittingapparatus consists of acondenser system which mayconvenientlybe described as consisting of two condensers of commonconstruction, one coating of one of the said condensers being connectedwith the single line, and the other coating coiiiiected with one wire ofthe double line traversing the exposed region, and alsoconnected withone coat- "ing of the other condenser, the other coating of which isconnected with the other wire of the double line. 7

The arrangement of wires orconductors and condensers is illustrated inthe drawing, in which the heavy signs and arrows show how an electricimpulse produced at one end of the line produces a similar impulse atthe other end, and the light arrows and signs showing the manner inwhich similar impulses in the two wires, such as produced byinductionfrom a neighboring wire in the exposed region, are neutralizedin their action on the single wire, thus producingno effect therein.

The main line 2 is grounded at the terminal station A, where it passesthrough the telephone T, or otherinstrument for producing electricalimpulses, an d thence passes to the region exposed to inductivedisturbance, which may be, for example, traversed by a cable includingseveral wires. The line-wire 2 is there connected with one of thecoatings or series of plates 19 of a condenser apparatus, 0, the othercoating, n,-of which is connected with a line, 3, traversing thedisturbed region, and also with another coating, n, arranged to act onstill another coating, 19, connected with another line, 4, traversingthe exposed region,

and insulated from the wire 3 and other parallel conductors. The wires 34 will be twisted together or otherwise arranged so that the mean oraverage distance of each from any neighboring conductor is the same, andthey are connected at their other ends with the coatings P N of acondenser apparatus similar to the one 0 already described. The coatingN is connected with another coating, N, afi'ected by the coating Pconnected with the wire 3 and a coating, P, under the inductive Iinfluence of the coating N is connected with while thewhole other set, aa, is connected with the line 3.

The operation in transmitting an impulse from one station to another, asfrom A to B, is as follows, the currents being indicated by the heavyarrows which represent positive electricity: A positive impulse orcurrent generated by the instrument T charges the coatingp with positiveelectricity, and this, in the well-known manner, acts on the coating nto charge it with negative electricity which has to be drawn from theline 3, the electricity of which is decomposed, the positive being sent,as indicated by the arrow, to the coating P, which it chargespositively, as indicated by the heavy sign The negative electricitydrawn to the coating n will also charge the connected coating 12, andthis in acting on the coating 9 will draw a charge of positiveelectricity from the line 4, as indicated by the heavy arrow, and willsend the negative electricity to charge the coating N, this effect beingalso increased by the action of the coating p on the one Nv connectedwith the one N. The negative charge on the plate N attracts a charge ofpositive electricity from the earth through the line 5 and instrument Ttherein, as indicated by the arrow. A negative impulse produced at Twill, in like manner, be reproduced at T, and impulses produced at Twill be reproduced at T, and in the transmission equal and oppositecurrents or impulses will be produced in the lines 3 4, which will justbalance and neutralize one another as far as any effect on neighboringlines is concerned. An impulse in any neighboringline, as D, willproduce, byindu'ction, like currentsin the wires 3 4, the direction orpolarity of which will de pend on the polarity of the current in thedisturbing line and whether the charge is increasing or decreasing at agiven point. If the two currents be such asrepresen ted by the lightarrows at athat is, positive currents awayfrom the condenser apparatusC-they willleavethe plates 19 and a charged with negative electricity,and that in the plate 1) acts on the plate a to produce positiveelectricity in the plate a, which neutralizes the negative charge in thecoating n, so that no effect is produced in the coating 19 and line 2.In asimilar manner the currents represented by the arrows at I) produceunlike charges in the coatiugsNN, which neutralize one another, sothatno effect is produced in the line 5.

It is obvious that there might be two or more exposed portions oftheline provided with double wires and suitable condenser apparatus, andthat the line may be employed to transmit or reproduce any kind ofvariable, undulatory, orintermittent impulses, such as telephonic ormagneto-electric currents produced by any suitable generator.

I claim- 1. In a line of electric communication, the

single wire or conductor and double wire or conductor combined withcondenser apparatus, the coatings of which are connected with the saidconductors, as described, whereby an impulse or current in the singlewire will produce equal and opposite impulses in the two wires of thedouble conductor, and equal and opposite impulses iu the doubleconductor will produce a single impulse in the single conductor, andequal and similar impulses in the double conductor will produce noeffect in the single conductor, substantially as described.

2. The single wire and double wire combined with the condenser, havingone set of coatings connected with the said single wire, and a portionof a second set of coatings affected thereby connected with one of thedouble wires, and a third set of coatings affected by the other portionof the said second set and connected with the other one of the saiddouble wires, substantially as and for the purpose set forth.

In testimony whereofI have signed my name to this specification in thepresence of two subscribing witnesses. 7

WILLIAM W. J AGQUES.

\Vitnesses:

Jos. P. LIVERMORE, BERNICE J. NovEs.

